Hargrave Jennings 
Phallism a Description of the Worship of Lingam-Yoni in Various Parts of the World, and in Different Ages [PDF ebook] 

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. In commending this new edition to the public, which has been carefully revised, we take the opportunity of again pointing out that such a treatise, dealt with scientifically and viewed in connection with its own times and circum stances, is free from the flavour of indelicacy which other wise might be supposed to be inseparable from the subject.